Will EEVEE be able to do real time ray tracing?
Not in a soon future. NVIDIA's GTX 20 series cards have the ability to do some real-time ray tracing but it's not enough for doing seamless rendering for any scene with high FPS (frames per second). Although, as mentioned here people can use these new graphics cards for renderings using EEVEE or Cycles but Blender is not able to take the advantage of the ray-tracing capabilities of these cards. However, based on some discussions I've had with Blender developers I know that they are considering using NVIDIA's APIs such as OptiX in the future. OptiX is backed by some advancements in AI that allows extremely fast denoising/approximation of ray-traced scenes with only 1 or 2 ray bounces instead of couple of hundreds or more. This way, you can get to pretty high FPSes (e.g. 60 or more) without the need to perfectly track rays for many bounces in the scene. Keep in mind that this is the first series of GPUs being able to perform many ray-tracing operations per second. This will only get better in the future with newer GPUs that will be capable of doing orders of magnitude more ray-tracing operations so that you won't need to do that much of approximation for the final scene rendering.